Hi Can anyone tell me why the vent in our bathroom does not blow as warm as the other two vents (in lounge and bedroom) in our van? Thanks
Blow Air Heating
- Thread starter missdiamonique
- Start date
Hi Anne
Someone might correct me if I am wrong but I think it has something to do with the distance the warm air has to travel and the fact that the pipes are not insulated.
Lisa
Someone might correct me if I am wrong but I think it has something to do with the distance the warm air has to travel and the fact that the pipes are not insulated.
Lisa
First of all check the trunking to ensure that it hasn't been detached anywhere.
There are normally two trunked outlets at the back of the heater. If one feeds the bathroom while the other feeds the loungev and bedroom, you can adjust the distribution between the two trunks by moving the lever - probably difficult to access behind the heater.
There are normally two trunked outlets at the back of the heater. If one feeds the bathroom while the other feeds the loungev and bedroom, you can adjust the distribution between the two trunks by moving the lever - probably difficult to access behind the heater.
anne
two reasons
1 it probably has a greater distance to travel from the fan
2 the ducting or tubing which the air travels along may lead to the outside of the 'van probably underneath, therefore the cool air outside is cooling the warm air in the duct
if it is too bad you may me able to lag the duct in some way
two reasons
1 it probably has a greater distance to travel from the fan
2 the ducting or tubing which the air travels along may lead to the outside of the 'van probably underneath, therefore the cool air outside is cooling the warm air in the duct
if it is too bad you may me able to lag the duct in some way
Damian
Moderator
It may be the distribution adjuster is set to deliver more to the other two outlets.
At the back of the fire, if it is a trumavent system, is a lever which controls the flow of air to the ducts.
At the back of the fire, if it is a trumavent system, is a lever which controls the flow of air to the ducts.
Hello Anne,
Lisa has given the simplest answer, however there is a bit more to it than just that.
The longer the duct the more resistance the duct has against airflow so the outlet velocity is reduced as length increases. For every 90 degree bend in the duct, it add the equivalent resistance of about 1.5 metres of straight duct, and of course, all outlets will reduce the available air to outlets further down the duct.
The normal straw-coloured duct is only aluminium foil wrapped in paper. Whilst this does provide some level of insulation, it does still lose heat, so again the longer the duct, the more heat will be lost along its length. However as the duct is usually contained within the caravan, the heat lost through the duct is still added to the caravan, so it is not totally lost.
Where the duct has to go sub-floor, the standard foil /paper construction is not suitable, as if it gets wet it quickly deteriorates, so it should be contained in either a waterproof over duct which also improved the insulation, or some manufactures choose to box it in with additional insulation material.
As has been suggested it is possible adjust the airflows on some heaters, but also if you reduce the opening of outlets closer to the heater, it will increase the flow to the more distant outlets.
Lisa has given the simplest answer, however there is a bit more to it than just that.
The longer the duct the more resistance the duct has against airflow so the outlet velocity is reduced as length increases. For every 90 degree bend in the duct, it add the equivalent resistance of about 1.5 metres of straight duct, and of course, all outlets will reduce the available air to outlets further down the duct.
The normal straw-coloured duct is only aluminium foil wrapped in paper. Whilst this does provide some level of insulation, it does still lose heat, so again the longer the duct, the more heat will be lost along its length. However as the duct is usually contained within the caravan, the heat lost through the duct is still added to the caravan, so it is not totally lost.
Where the duct has to go sub-floor, the standard foil /paper construction is not suitable, as if it gets wet it quickly deteriorates, so it should be contained in either a waterproof over duct which also improved the insulation, or some manufactures choose to box it in with additional insulation material.
As has been suggested it is possible adjust the airflows on some heaters, but also if you reduce the opening of outlets closer to the heater, it will increase the flow to the more distant outlets.
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